Micrel, Inc.
MIC2810
February 2008
4
M9999-022008-C
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
, V
IN1
, V
IN2
)...............................0V to 6V
Enable Input Voltage (V
EN
, V
EN1
, V
EN2
)...................0V to V
IN
Power Dissipation..................................Internally Limited
(3)
Lead Temperature (soldering, 10 sec.)......................260癈
Storage Temperature (T
s
).........................65癈 to +150癈
ESD Rating
(4)
..................................................................2kV
Operating Ratings
(2)
Supply Voltage (V
IN
, V
IN2
).................................2.7V to 5.5V
Supply Voltage (V
IN1
)......................................1.65V to 5.5V
Enable Input Voltage (V
EN
, V
EN1
, V
EN2
)...................0V to V
IN
Junction Temperature (T
J
)........................40癈 to +125癈
Junction Thermal Resistance
  MLF-16 (?/DIV>
JA
)......................................................56癈/W
Electrical Characteristics
(5)
V
IN
= V
IN1
= V
IN2
= EN1 = EN2 = EN = /LOWQ = V
OUT
(6)
+ 1V; C
OUTDC/DC
= 2.2礔, C
LDO1
= C
LDO2
= 2.2礔; I
OUTDC/DC
= 100mA;
I
OUTLDO1
= I
OUTLDO2
= 100礎(chǔ); T
J
= 25癈, bold values indicate 40癈 <
T
J
<
+125癈; unless noted.
Parameter
Conditions
Min   Typ    Max    Units
UVLO Threshold
Rising input voltage during turn-on
2.45   2.55    2.65     V
UVLO Hysteresis
   100          mV
Ground Pin Current
V
FB
= GND (not switching);
LDO1 or LDO2 (EN = GND; EN1 or EN2 = GND)
   800
55
1100
85
95
礎(chǔ)
礎(chǔ)
礎(chǔ)
Ground Pin Current in
Shutdown
EN = EN1 = EN2 = 0V
    0.2     5     礎(chǔ)
Ground Pin Current
(LOWQ
?/DIV>
mode)
I
DC/DC
<
I
LDO1
<
I
LDO2
<
10mA (/LOWQ = GND)
LDO1 or LDO2 (EN = GND; EN1 or EN2 = GND);
I
OUT
<
10mA (/LOWQ = GND)
    38
20
60
80
70
礎(chǔ)
礎(chǔ)
礎(chǔ)
Over-temperature Shutdown    
   160     
癈
Over-temperature Shutdown
Hysteresis
    23     
癈
Enable Inputs (EN; EN1; EN2; /LOWQ )
Logic Low
         0.2     V
Enable Input Voltage
Logic High
1.0     
V
V
IL
<
0.2V
    0.1     1     礎(chǔ)
Enable Input Current
V
IH
>
1.0V
    0.1     1     礎(chǔ)
Turn-on Time
Turn-on Time
(LDO1 and LDO2)
   240    500     ?/SPAN>s
Turn-on Time (DC/DC)
(/LOWQ = V
IN
; I
LOAD
= 300mA); (/LOWQ = GND; I
LOAD
=
10mA)
    83    350     ?/SPAN>s
POR Output
Low Threshold, % of nominal (V
DC/DC
or V
LDO1
or V
LDO2
) (Flag
ON)
90    91     
%
VTH
High Threshold, % of nominal (V
DC/DC
AND V
LDO1
AND
V
LDO2
) (Flag OFF)
    96     99     %
VOL
POR Output Logic Low Voltage; IL = 250礎(chǔ)
    10    100    mV
IPOR
Flag Leakage Current, Flag OFF
   0.01     1     ?/SPAN>A
SET INPUT
SET Pin Current Source
VSET = 0V
0.75   1.25    1.75    礎(chǔ)
SET Pin Threshold Voltage     POR = High
   1.25     
V
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